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Classification of light fastness and weather fastness of orange pigments and studies in waterborne latex paints / Artur Palasz in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4673 (02/2022)
[article]
Titre : Classification of light fastness and weather fastness of orange pigments and studies in waterborne latex paints Type de document : texte imprimé Auteurs : Artur Palasz, Auteur Année de publication : 2022 Article en page(s) : p. 21-26 Langues : Anglais (eng) Catégories : Evaluation
Latex
Orange (couleur)
Photostabilité
Pigments
Résistance aux conditions climatiques
Revêtements en bâtiment
Revêtements en phase aqueuse:Peinture en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : The author discusses methods of assessing pigments, in this case orange pigments, in water-based architectural paints as façade paints for exterior and interior applications.
Pigments are an extremely important group of raw materials used in the production of architectural paints. Both in the form of dry pigments and pigment concentrates (colourants), they allow for obtaining coloured coatings, which not only decorate our interiors, fences and façades, but also act as safety indicators, eg in paints for marking traffic routes or warning symbols. From an operational and economic point of view, their durability is extremely important, and knowledge about their durability to weather conditions is needed to select them for various applications, ranging from exposure to solar radiation, to operation at high temperatures. Due to the susceptibility of pigments as chemical compounds to changes in their properties, which are usually manifested in architectural paints, they must be properly classified and characterised for their proper use in formulations.
In the article, I focused on the classification of pigments that exist on the market and their resistance to light (lightfastness) and weather factors (weatherability), as well as on case studies of the exposure of three different organic orange pigments using various methods of exposure to artificial (laboratory) light sources and accelerated action of weather conditions. The article is dedicated to the methods of assessing pigments, in this case orange pigments, in water-based architectural paints as façade paints for external application, fade due to weather conditions and for interior paints fade due light exposure through window glass. This paper also exemplifies the resistance to such factors under simulated laboratory conditions, in the form of data that the paint industry needs to develop weatherability and Iightfastness stable latex paint coatings for both indoor and outdoor use. These data should usually be included in guide formulations and start point formulations, which significantly accelerate R&D work in paint production companies, and above all, make a decision on whether to accept a given raw material for testing.Note de contenu : - LIGHTFASTNESS TESTS OF PIGMENTS : Exposure methods according to ASTM D4303 - Assessment of colour changes and classification of pigments
- MARKET REQUIREMENTS FOR PAINTS AND COATINGS : UV exposure
- EXPERIMENTAL : Pigments for studies - Paints for studies
- TESTING PROGRAMME
- TEST RESULTS
- DISCUSSION OF TEST RESULTSEn ligne : https://drive.google.com/file/d/1ugJlgaQPeYJBq35jmlei36qMdNELdT3L/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36971
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4673 (02/2022) . - p. 21-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23211 - Périodique Bibliothèque principale Documentaires Disponible Clinical and in vitro evaluation of new anti-redness cosmetic products in subjects with winter xerosis and sensitive skin / Stéphanie J. Nisbet in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 41, N° 6 (12/2019)
[article]
Titre : Clinical and in vitro evaluation of new anti-redness cosmetic products in subjects with winter xerosis and sensitive skin Type de document : texte imprimé Auteurs : Stéphanie J. Nisbet, Auteur ; D. Targett, Auteur ; Anthony V. Rawlings, Auteur ; K. Qian, Auteur ; X. Wang, Auteur ; M. A. Thompson, Auteur ; P. A. Bulsara, Auteur ; D. J. Moore, Auteur Année de publication : 2019 Article en page(s) : p. 534-547 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques
Etude in vitro
Etudes cliniques
Evaluation
KératinocytesLes kératinocytes sont des cellules constituant 90 % de la couche superficielle de la peau (épiderme) et des phanères (ongles, cheveux, poils, plumes, écailles). Ils synthétisent la kératine (kératinisation), une protéine fibreuse et insoluble dans l'eau, qui assure à la peau sa propriété d'imperméabilité et de protection extérieure.
L'épiderme est divisé en 4 couches basées sur la morphologie des kératinocytes (de l'intérieur vers l'extérieur) :
1. stratum germinativum (couche basale à la jonction avec le derme)
2. stratum spinosum
3. stratum granulosum
4. stratum lucidum
5. stratum corneum
Les kératinocytes passent progressivement de la couche basale vers les couches supérieures par différenciation cellulaire jusqu'au stratum corneum ou ils forment une couche de cellules mortes nommées squames, par apoptose. Cette couche constitue une barrière de protection et réduit la perte d'eau de l'organisme.
Les kératinocytes sont en perpétuel renouvellement. Ils mettent environ 1 mois pour aller de la couche basale au stratum corneum mais ce processus peut être accéléré en cas d'hyperprolifération de kératinocyte (psoriasis).
Peau -- Physiologie
Peau -- Soins et hygiène
Rougeurs cutanées
Sécheresse cutanéeUne xérose est un dessèchement de la peau.
Elle peut avoir différentes causes, comme certaines pathologies (dermatite atopique aussi appelé eczéma atopique), des carences, notamment en Vitamine A, ou des facteurs externes, comme les contacts avec des substances irritantes ou le traitement par certains médicaments.
Sensibilité cutanée
Tests de sécuritéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : To demonstrate the in vitro activities of panthenol, palmitoylethanolamide (PEA), and niacinamide (NAM) and determine the biophysical properties, clinical safety, tolerability together with efficacy of two developmental anti‐redness (AR) formulations containing these ingredients, in alleviating facial redness associated with winter xerosis in healthy volunteers with sensitive skin.
- Methods : The anti-inflammatory and skin protective properties of panthenol, PEA and NAM were evaluated in vitro. The physical properties of the AR formulations were analysed using measurement of water vapour transport rate (WVTR) and infrared spectroscopy. Clinical studies were performed between the months of December and April (2014–2015) with efficacy assessed during the winter. Facial redness, irritation, sensitization potential, photo-irritation, and photo-sensitization were evaluated. Self-assessed adverse reactions were reported in diaries of use.
- Results : Panthenol and PEA reduced prostaglandin E2, interleukin-6, and thymic stromal lymphopoietin levels in vitro, while NAM induced nicotinamide adenine dinucleotide (NAD) levels and the keratinocyte differentiation markers: filaggrin (2-fold increase, P < 0.001), loricrin (2-fold increase, P < 0.05), involucrin (2 fold increase, P < 0.001) & peroxisomal proliferator activated receptor-alpha (1.5 fold increase, P < 0.05). The two AR products exhibited low WVTR vs. no treatment (P < 0.001) and displayed an ordered lipid structure. The day cream formulation protected against ultraviolet B radiation in vitro. A total of 382 participants were included in clinical studies which showed the AR formulations significantly improved facial redness associated with winter xerosis (Day 29 mean change from baseline: AR day cream 0.77 (P < 0.001); AR serum 0.67 (P < 0.001)). No irritation, sensitization, photo-irritation, photo-sensitization or product-related adverse reactions were observed or reported in the clinical studies.
- Conclusion : The new products significantly improved skin redness associated with winter xerosis in participants with self-perceived sensitive skin. Both products were well tolerated with a suitable safety profile for topical use in subjects with sensitive skin.Note de contenu : - METHODS : In vitro studies - Clinical trials - AR day cream and AR serum
- RESULTS : In vitro studies - Clinical studiesDOI : 10.1111/ics.12559 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/ics.12559 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33662
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 41, N° 6 (12/2019) . - p. 534-547[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21409 - Périodique Bibliothèque principale Documentaires Disponible Clinically proven benefits of organic certified products / Andrea Mitarotonda in PERSONAL CARE EUROPE, Vol. 6, N° 5 (11/2013)
[article]
Titre : Clinically proven benefits of organic certified products Type de document : texte imprimé Auteurs : Andrea Mitarotonda, Auteur ; Frances Johnson, Auteur ; Lucy Koch, Auteur Année de publication : 2013 Article en page(s) : p. 87-90 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Antiâge
Biocosmétiques
Etudes cliniques
Evaluation
Maquillage
Mascaras
Qualité -- Contrôle
Tests d'efficacitéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : There is a general belief that natural and organic cosmetic products cannot deliver strong benefits and only basic claims can be achieved. This is due to the limited number of ingredients available to those who are formulating certified products. When transposed to skin care claims, it usually means hydration and moisturisation derived benefits.
When it comes to makeup, the absence of truly performing colour cosmetics can lead 'green consumers' to look at more standard brands in order to get their favourite look. With this article the authors would like to demonstrate that it is possible to develop organic certified products that are clinically proven to be effective.Note de contenu : - Approach to effective formulation of skin care products
- Development of a clinically proven organic certified skin care product
- Development of a clinically proven organic certified mascaraEn ligne : https://drive.google.com/file/d/1cUdrILNm6gh_UyWkpLWrVUykHPNWNB9g/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19885
in PERSONAL CARE EUROPE > Vol. 6, N° 5 (11/2013) . - p. 87-90[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 15686 - Périodique Bibliothèque principale Documentaires Disponible CoaST Maritime Test Centre : an investigation of biofouling propensity / Morten L. Pedersen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)
[article]
Titre : CoaST Maritime Test Centre : an investigation of biofouling propensity Type de document : texte imprimé Auteurs : Morten L. Pedersen, Auteur ; Burak Ulusoy, Auteur ; Claus Erik Weinell, Auteur ; Frederikke B. Zilstorff, Auteur ; Songgeng Li, Auteur ; Kim Dam-Johansen, Auteur Année de publication : 2023 Article en page(s) : p. 857-868 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Encrassement
Essais (technologie)
Evaluation
Revêtements -- Détérioration
Salissures biologiques
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : The performance of fouling control coatings (FCC) is evaluated based on static exposure on test sites worldwide. There are different standards concerning the evaluation of the performance of the FCC. However, to the knowledge of the authors, there is not a standardized reporting guideline for how to evaluate the test site in which the FCC is exposed. Several factors such as water conditions, seasonal biofouling, and accessibility of sunlight can vary dependent on placement within or between test sites. This in turn makes it difficult to compare the performance of FCC exposed at different locations within a or at another test site. In this study, an analysis of the CoaST Maritime Test Centre (CMTC) has been performed to investigate how geographical orientation and changes in depth influence the biofouling propensity on coated panels. The investigation showed no statistical significance in the biofouling propensity between panels exposed to different geographical orientations at the CMTC. Similarly, no statistical significance was found between panels placed at different depths at the CMTC. If similar reporting was performed at other test sites, a better basis for comparison of FCC worldwide would be obtained, and this could be achieved with a standardized reporting guideline. Note de contenu : - METHOD : CoaST Maritime Test Centre - Test panels - Evaluation method
- RESULTS AND DISCUSSION : Biofouling environment at the CMTC - The influence of geographical orientation on the biofouling propensity - The influence of depth on the biofouling propensity - Horizontal setup - Standardized reporting for comparability of FCC within and between test sites
- Table 1 : The coverage percentage intervals and the related weighted values for the four biofouling categories
- Table 2 : Investigation of the influence of geographical orientation on biofouling growth
- Table 3 : The significance of the biofouling deviation between the cartridges fourth and fifth row, due to the difference in depthDOI : https://doi.org/10.1007/s11998-022-00707-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00707-w.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39433
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 857-868[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24069 - Périodique Bibliothèque principale Documentaires Disponible Coatings characterization using multiple techniques and statistically designed experiments / Michael Neag in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 832 (05/1994)
[article]
Titre : Coatings characterization using multiple techniques and statistically designed experiments Type de document : texte imprimé Auteurs : Michael Neag, Auteur ; Patti Wilson, Auteur ; Gary Skerl, Auteur Année de publication : 1994 Article en page(s) : p. 27-36 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Evaluation
Formulation (Génie chimique)
Plan d'expérience
Revêtements:Peinture
Statistique
Tests d'efficacitéIndex. décimale : 667.9 Revêtements et enduits Résumé : This research centered on discovering individual relationships between formulation variables and the coating's performance. Variations in properties related to changes in catalyst, crosslinker, pigment, and an additive were studied using controlled stress rheometry, dynamic mechanical analysis, and tensile tests. A statistical design combining the elements of both a screening design and a response surface design significantly reduced experimental time, while fulfilling a broad array of experimental objectives. Among other things, this work revealed that the coatings were incompletely cured under typical bake conditions, the catalyst had the strongest influence on properties, and pigmentation reduced the performance properties. The results of this work led to significant improvements in the products performance and cost. Note de contenu : - EXPERIMENTAL : Instrumentation - Cure studies
- RESULTS AND DISCUSSION : Time-temperature superposition of DMA cure curves - Statistical design analysisPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18626
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 832 (05/1994) . - p. 27-36[article]Réservation
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